Electric-switch mechanism.



C. KINGAN.

ELECTRIC SWITCH MECHANISM. APPLlCATlON FILED OCT. 10, 1914.

1,208,571. Patented Dec. 12,1916.v

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Wbrvyt'uy Key Cir c at!" w/r/vsss.-' MENTOR i5 EM Chm/ea K7070 I BYATTORNEY "UNITED STATES PATENT OFFICE.

CHARLES KINGAN, OF EDINBURG, INDIANA, ASSIGNOR F ONE-HALF 'IO JOHN T.MIDDLETON, OF EDINBURG, INDIANA.

ELECTRIC-SWITCH MECHANISM.

Specification of Letters Patent.

Patented Dec. 12, 1916.

Application filed October 10, 1914. Serial No. 866,094.

To all whom it may concern Be it known that I, CHARLES KINGAN, a citizenof the United States, and a resident of Edinburg, county of Johnson, andState of Indiana, have invented a certain new and useful Electric-SwitchMechanism; and I do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, in which like letters refer to like parts.

The object of this invention is the improvement of automatic currentcontrolling switches or means, and particularly adapted for use inconnection with pole changers,

'- motor generators and the like. Heretofore,

particularly in telephone constructions the pole changers were operatedall of the time but with this invention the pole changer circuit and theA. C. circuit are both open when the device is not in use. Said objectis accomplished essentially by the provision of a double switch which,when actuated, closes two independent circuits. Intelephoneconstructions, one of these circuits runs to the D. C. side of the polechanger or motor generator and the other from the A. C. side thereof.When the telephone is not in use both of said circuits are open, butwhen the ringing key at the central telephone station is inserted, theswitch is actuated and the two circuits closed.

The nature of the invention will be understood from the accompanyingdrawings and the following description and claims.

In the drawings, Figure 1 is an elevation of the switch mechanism withthe wiring associated therewith shown in diagram. Fig. 2 is a section onthe line 22 of Fig. 1 and on a larger scale.

Referring first to the switch construction shown, there is a base with aplate 11 thereon for supporting the magnets 12 and 13 which have coresl4 and 15 extending through a stationary plate 16. The magnets arebeside each other and said plate 16 has on one side a central upwardlyextending arm 17 on which a construction 18 is secured and its free endis secured midway to an armature bar 19. Said spring supports saidarmature bar over and out of contact with the cores 15 normally, butwhen said magnets are energized, said cores attract both ends of the bar19 and simultaneously move it downward. In each end of said bar 19 thereis a block 20 of insulating material on which a contact arm 21 issecured projecting beyond the end of the bar 19.

On one end of plate 16 there is rigidly secured an arm 22 and its outerend is upturned to receive a screw 23 on which contact terminals 24 and25 are secured. These terminals 24 and 25 are insulated by insulation 26from each other and the screw From said terminals 24 and 25 wires 27 and28 run to the D. C. side of the pole changer or motor generator or otherlike device, and constitute an independent circuit which is closed bythe free end of terminal 25 being pressed down into engagement with theend of terminal 24 by arm 21 on the armature 19 when it is attracted bythe magnets. The terminal bars 24 and 25 are formed of spring metal andarranged so that normally their free ends remain slightly apart, asshown, but pressure on the upper one will bring them together. At theother end of the plate 16 there is secured an arm 32 similar to the arm22 and there is a screw 33, terminals 34 and 35, insulation 86 and lines37 and 38 similar to the construction above described excepting that theline 37 runs to the ringing key circuit 46 through the line 39 and to aswitch board 45.

Normally the circuit is open when the key in the switch board is out.When the switch on the board is closed, it closes the circuit throughthe starting battery 48 which goes through the line 41 up through thecoils 12 and 13 and down through the line and through the switch boardand back through the line 39. This circuit excites the coils andoperates the armature which closes the switches 34 and 35, and also 24and 25. When these switches are closed, a circuit is closed through thebattery 49 which is in series with the contact springs 24 and 25 throughthe lines 27 and 28. This sets up a direct current to the buzzer 50which is on the pole changer 51. The battery 49 supplies current for theringing key circuit which is connected to the pole changer by the lines53 and 54. The pole changer is in turn connected to the lines 38 and 40by means of which an alternating current is set up which passes throughthe springs 34 and 35 which are closed and through the lines 37 and 39to the ringing key circuit 46 and then through the switch board which isclosed back through the line 40 to the pole changer. This alternatingcurrent is strong enough for ringing the telephone bells or the like onthe circuit throughout the outlying country. As soon as it is desired tostop ringing the bell, the circuit is opened at the switch board andcurrent ceases to go throughout the whole system.

Heretofore in telephone systems it has been necessary to keep the buzzerand pole changer constantly going, which wears out the batteries in ashort time, but in this system the batteries are not drawn on unless theswitch on the switch board is closed for ringing a subscriber, forinstead of having the buzzer constantly going, it is started by thestarting battery, operating through the magnetic coils and the armatureand switches 24- and 25 when it is desired to set up the alternatingcurrent for ringing anyone and as soon as the switch key is removed thiscurrent ceases. 7

Any similar switch mechanism may be used on this system and, therefore,the invention is not restricted to the particular construction of thismechanism.

The invention claimed is:

1. In an electric system, the combination with a D. C. circuit, an A. C.circuit, a

second D. C. circuit, and a pole changer, of a switch mechanismincluding a magnet coil, an armature adapted to be excited by said coil,a switch mechanism adapted to be closed by said armature for closingsaid second-mentioned D. C. circuit and said A. C. circuit, and a switchboard for closing said first-mentioned D. C. circuit.

2. In an electric system, the combination with a D. C. circuit, an A. C.circuit, a second D. C. circuit, and a pole changer, of a switchmechanism adapted to close said second mentioned D. C. circuit and saidA. C. circuit, a magnet coil on said switch mechanism, a startingbattery, a switch board, and a circuit through said starting battery,switch board and a magnet coil for closing said switch mechanism andsetting up the current through said D. C; circuit and A. C. circuit.

In witness whereof, I have hereunto aiiixed my signature in the presenceof the witnesses herein named.

CHARLES KINGAN.

Witnesses:

J. H. WELLS, O. M. MGLAUGHLIN.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of ZPatents, Washington, 13. G.

